CUET Preparation Today
In △ABC, if AB = AC and ∠BAC = 40°, then the measure of ∠B is: |
60° 40° 70° 50° |
70° |
As , AB = AC So, ABC is an isosceles triangle. ⇒ ∠ABC = ∠ACB In triangle ABC , ∠ABC + ∠ACB + ∠BAC = 180º ∠ABC + ∠ABC + 40º = 180º 2∠ABC = 140º ∠ABC = 70º |
.PNG)